124071889
AMEX NATL BANK
✓ Valid Checksum
Active
- Institution Name
- AMEX NATL BANK
- Institution Type
- Commercial Bank
- Address
- 4315 S 2700 W
- City / State
- SANDY, UT
- ZIP Code
- 84184
- Phone
- (800) 792-8001
Supported Transaction Types
✓ ACH Transfers
Direct deposit, bill pay, person-to-person transfers. Processed in 1–3 business days.
✓ Wire Transfers
Real-time, same-day settlement via Fedwire. Used for large or time-sensitive transfers.
✓ Check Processing
Printed on the bottom-left of checks. Used to route paper and electronic check payments.
Note: Some banks use a separate routing number for wire transfers. Always confirm wire routing numbers directly with your bank before initiating a wire transfer.
ABA Checksum Validation
Every ABA routing number includes a built-in check digit (the 9th digit) that allows banks to detect transcription errors automatically. The checksum uses a weighted formula: multiply each digit by 3, 7, 1, 3, 7, 1, 3, 7, 1 and the sum must be divisible by 10.
×3
1
3
×7
2
14
×1
4
4
×3
0
0
×7
7
49
×1
1
1
×3
8
24
×7
8
56
×1
9
9
Sum = 3 + 14 + 4 + 0 + 49 + 1 + 24 + 56 + 9 = 160
160 ÷ 10 = 16 remainder 0 → Valid routing number
Quick Reference
Other Routing Numbers for AMEX NATL BANK
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